# SDR ASAA2014123110104

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 31, 2014
- Submitted: January 2, 2015
- Operation: Air carrier
- Aircraft: [N535AS](https://openairdocs.org/aircraft/N535AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35200
- Aircraft time: 15,494 hours, 4,547 cycles
- System (JASC): [3020 · Air Intake Anti/De-Ice System](https://openairdocs.org/jasc/3020)
- Part: Sensor
- Part number: 21SN4152
- Condition: Failed
- Location: Nr 1 Anti Ice
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2014123110104

## Discrepancy

AFTER ENGINE START LT ENGINE AMBER COWL A/I VALVE CAME ON AFTER START, THEN EXTINGUISHED.  LIGHT AGAIN CAME ON ON TAXI OUT.  RAN QRH CALLED MAINTENANCE CONTROL. ACFT GROUNDED. IAW AMM 30-21-21, REPLACED NR 1 ENG TAI PRESSURE SENSOR.  RAN NR 1 ENG AT T/O POWER, 4 CYCLES W/NO ANTI-ICE FAULTS INDICATED.

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